Sol containing nano zirconia particles for use in additive manufacturing processes for the production of 3-dimensional articles

US11339095B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Helmar B. Mayr · Kaufering, DE
• Malte Korten · Moorenweis, DE
• Christine M. Andres · Washington, US
• Brant U. Kolb · Afton, US
• Holger Hauptmann · Sindelsdorf, DE
• Gallus Schechner · Herrsching am Ammersee, DE
• Michael Jahns · Gilching, DE
• Kathleen M. Humpal · Stillwater, US
• Melissa A. Lackey · Sunderland, US
• Paul D. Pennington · Farmington, US

Key dates

• Filing date: May 26, 2016
• Grant date: May 24, 2022
• Expiry date: Feb 24, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9653
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process.